Surface model FEA static solution error

I have made a surface model of a bike chassis and used knot surface command to bonded for the surfaces. When I start to do static study, after like 4 to 5 hours, it displays the error static model failed. The meshing does not create any problems. I have located fixtures and used the appropriate material for the chassis. Under the shell manager, I have chosen the 'Thick' shell option and given 0.15 cm thickness for the surfaces. However, it does not solve the analysis.

I have checked the "under constrained" bodies, but it gives me the following message attached in the image about DOF of under constrained parts. What should I do to make constraints on them?? Or what type of contacts to use for the analysis?

Replace it with a surface, then trim the resulting surface so that it's in contact with that 'pipe'. For the best chance of convincing solidoworks to work, use "splitline"s so that the two surface meet on an edge. Like this:

Use the "offset surface" tool, it's very handy for work like this.

2. Same thing as above here. The orange face highlighted cannot go into the body like that. It needs to meet the pipe somehow.

3. This solid body I would replace with a surface, and call it 15mm thick (halfway between 20mm and 10mm, should be good enough as long as it's not right there that everything happens!). Also follow the same rules as above.

Then once you're done with that, you will need to check that solidworks believes there's joins there. I can't remember how or where that's done, but hopefully knowing you need to check that will give you enough info to check.

I have created the surfaces instead of solids like you said. Everything is okay as far as I check, but checking in the 'Under-constrained body' for DOF, the only body which has degree of freedoms is the whole body (Group 1) in the image. What should I need to do to resolve this?

Besides, this is not an assembly model, I have created a part model and applied bonded contacts between mating surfaces. Please review attached solidworks file.